Looking more substantial than its predecessor, the 1-Series has an improved interior and a variety of fuel efficient engines.

The 2012 BMW 1-Series has leaked to the web, ahead of its unveiling at the Frankfurt Motor Show.

Looking more substantial than its predecessor, the model adopts a prominent front fascia that draws inspiration from the 5-Series GT and 7-Series. The rest of the car is an evolution of the previous model, but the overall design seems rather promising.

Since the car rides on a longer 2.69 meter (105.9 inch) wheelbase, the cabin is roomier and luggage capacity climbs by an additional 200 liters (7 cubic feet). Additional information is limited, but the interior has higher quality materials, an improved design, and a 6.5-inch (or optional 8.8-inch) iDrive display. Furthermore, option include a collision warning system, speed limit detection, and Internet connectivity.

As part of BMW's EfficientDynamics strategy, all models will come equipped with an engine start/stop system and regenerative brakes. This should enable the 1-Series to have an average fuel consumption that ranges from 4.3 to 5.8 liters per 100 kilometers (40.6 to 54.7 mpg US / 48.7 to 65.7 mpg UK).

The 2012 BMW 1-Series will go on sale later this fall, so stay tuned for additional information.